#app{
	position: fixed;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	background: url("../images/bg.jpg") no-repeat;
	background-size: 100% 100%;
}
.wrap {
  width: 800px;
  height: 544px;
  position: fixed;
  left: 50%;
  top: 50%;
  margin-left: -400px;
  margin-top: -272px;
  align-content: center;
  justify-content: center;
}
h1{
	text-align: center;
	margin-top: 30px;
	margin-bottom: 30px;
	font-weight: bolder;
}
.row{
	text-align: center;
	font-weight: bold;
	font-size: x-large;
	margin-top: 20px;
	line-height: 30px;
}
.input1{
	height: 30px;
	width: 250px;
	font-weight: bold;
	font-size: large;
}
.btn1{
	height:50px ;
	width: 80px;
	font-weight: bold;
	font-size: large;
	border-radius: 50px;
	margin-left: 10px;
}
.tips{
	color: red;
}